ALCO Bullets constantly works to perfect our techniques to provide great bullets for long range shooters. ALCO’s Precision .308 in 220 grain is one that has been a stellar performer for magnum 30 caliber rifles. The recommended barrel twist is 1:10 or faster. The rebated boat tail design is key to accuracy at for ultra long distance precision shooting. The bullet has a G1-BC of .888 – thank you.